Feeders and storage silos

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Feeders and storage silos

  1. 1. FEEDERS & STORAGE SILOS<br />
  2. 2. FEEDERS<br /> Feeders are machineries used in assembly and manufacturing applications to move or “transport” materials or products to a designated storage or to other processing equipment.<br />
  3. 3. Types of Feeders<br />
  4. 4. Rotary Feeders<br />
  5. 5. rotating element or vane discharges powder or granules at a predetermined rate<br />often used with large amounts of solid material<br />power comes from an internal combustion engine or an electrical motor<br />
  6. 6.
  7. 7. Vibratory Feeders<br />
  8. 8. use both vibration and gravity to move material<br />used to transport a large number of smaller objects<br />uncontrolled recovery of the material from top of feeder<br />controlled delivery of the material from bottom of feeder<br />
  9. 9. How It Works<br />
  10. 10. Example: PILL BOTTLING SYSTEM<br />a large batch of pills is dumped into the top of the vibratory feeder<br />gravity will pull the pills toward the bottom of the feeder where they can exit one at a time so that they can be counted<br />once the correct number is in the container, the feed is stopped until a new bottle is placed in position<br />
  11. 11. Screw Feeders<br />
  12. 12. used for handling bulk materials, in which a rotating helicoid screw moves the material forward, toward and into a process unit.<br />very similar to screw conveyors in their basic structure, both of which are based on the principles of the Archimedean screw<br />capable of delivering dense slurries and dry granular products with great accuracy at a range of operational speeds<br />drive is controlled by servo motors capable of precise stop-start and speed control<br />
  13. 13. VOLUMETRIC SCREW FEEDERS<br /><ul><li> amount of material transported is carefully calculated and controlled by adjusting the speed at which the screw turns.
  14. 14. very accurate feed values to be maintained
  15. 15. rotational speed may be preset or constantly adjusted</li></ul>GRAVIMETRIC SCREW FEEDER<br /><ul><li>delivery rate is controlled by adjusting the rate at which the material is introduced into the machine</li></li></ul><li>Apron Feeders<br />
  16. 16. a limited-length version of apron conveyor <br />also known as plate-belt feeder; plate feeder.<br />allows automatic control the volume of materials that are added to a process<br />construct is from heavy, durable materials like steel<br />
  17. 17. the belt portion of the apron feeder is made from thick steel trays or pans<br />can be found in mining operations, factories, and concrete plants<br />cannot be used in applications where precise feeding and measuring is required<br />
  18. 18. How It Works<br />
  19. 19. Materials that will be carried by the apron feeder are held in a large hopper above one end of the belt. The amount of material that reaches the feeder is determined by the distance between this hopper and the top of the feeder.<br />As the hopper deposits materials onto the apron feeder, the metal pans that make up the belt travel horizontally like a conveyor belt.<br />When the trays reach the end of the belt, they dump, or feed the materials into another vessel.<br />
  20. 20. Bowl Feeders<br />
  21. 21. used to feed parts to an assembly line or piece of manufacturing equipment<br />individual components exit the feeder at specific intervals and enter the next step in the assembly process<br />Each bowl feeder uses special sensors to spot jams or parts that may be misaligned.<br />one drawback is its precise operation.<br />
  22. 22. How It Works<br />
  23. 23. In a standard application:<br />the bowl feeder sits below a hopper or bin<br />workers fill the hopper with bulk material, and these objects fall into the feeder below<br />
  24. 24. Types of Bowl Feeders<br />
  25. 25. Cylindrical<br />Material<br /><ul><li>Aluminum/Steel/Stainless Steel</li></ul>Suitable for:<br /><ul><li>Continuous transport of components and for handling small parts</li></li></ul><li>Conical<br />Material<br /><ul><li>Aluminum/Stainless Steel</li></ul>Suitable for:<br /><ul><li>Heavy sharp-edged components
  26. 26. Larger Loads
  27. 27. Automatic pre-separating</li></li></ul><li>Stepped<br />Material<br /><ul><li>Aluminum/Stainless Steel</li></ul>Suitable for:<br /><ul><li>Larger loads and larger components
  28. 28. Similar to conical bowls</li></li></ul><li>Polyamide bowl (conical or stepped)<br />Suitable for:<br /><ul><li>Small components with simple geometry and where mass production of feeders is required</li></li></ul><li>STORAGE SILOS<br />A silo is a structure for storing bulk materials. Silos are used in agriculture to store grain (see grain elevators) or fermented feed known as silage. Silos are more commonly used for bulk storage of grain, coal, cement, carbon black, woodchips, food products and sawdust. Three types of silos are in widespread use today - tower silos, bunker silos and bag silos. Missile silos are used for the storage and launching of ballistic missiles.<br />
  29. 29. Types of Silos<br />
  30. 30. Tower Silos<br />
  31. 31. most common type of silo<br />can be made of concrete, brick, metal, wood, and other materials<br />loading and unloading is done with automated systems<br />
  32. 32. Bunker Silos<br />
  33. 33. are trenches, usually with concrete walls, <br />covered with a plastic tarp to make it airtight<br />automated systems for loading and unloading<br />more low profile than tower silos<br />better insulated<br />
  34. 34. Bag silos<br />
  35. 35. 8 to 12 ft in diameter<br />unloaded using a tractor and loader or skid-steer loader.<br />require little capital investment.<br />temporary measure when growth or harvest conditions require more space.<br />
  36. 36. Skid-steer Loader<br />
  37. 37. Bins<br />
  38. 38. shorter than a silo<br />used for holding dry matter<br />shape is either round or squared<br />contain a hollow perforated or screened central shaft<br />

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